Descending Triangle: Depth of pattern looks to originate from 3760 towards the base of 3380, forming a considerable 380 points. Pattern is valid as price closed below 3380. Hence, technical target would be at 3000 based on the pattern. That accounts for a fall of little more than 10% from 3380.
Bear Flag: Depth of pattern looks to originate from 3525 towards the base of 3380, forming 145 points. Pattern is valid as price closed below 3380. Technical target would be at 3235 according to this pattern. That accounts for a fall of little more than 4% from 3380.
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